n | a(n) |
---|---|
1 | 2 |
2 | 6 |
3 | 28 |
4 | 90 |
5 | 1488 |
6 | 945 |
7 | 182880 |
8 | 9450 |
9 | 8241408 |
10 | 93555 |
11 | 14856307200 |
12 | 638512875 |
13 | 1569400842240 |
14 | 18243225 |
15 | 5713142135500800 |
16 | 325641566250 |
17 | 1096948397364019200 |
18 | 38979295480125 |
19 | 6713362606110031872000 |
20 | 1531329465290625 |
21 | 408173030347971900211200 |
22 | 13447856940643125 |
[2,6,28,90,1488,945,182880,9450,8241408,93555, 14856307200,638512875,1569400842240,18243225, 5713142135500800,325641566250,1096948397364019200, 38979295480125,6713362606110031872000, 1531329465290625,408173030347971900211200, 13447856940643125] |